Hi, pls how can i know the year of my yamaha yz 125 the engine number starts with e113e

Most motorcycle vin numbers follow the same pattern, according to your number, it is an '05.

yz,,,,125,,,, 2,,,,,,,,,g,,,,,,,,,h,,,,,,,,,,,,0,,,,,,,,,0,,,,,,,,,2,,,,,,,,,,,,,,,,5,,,,,,,,,1,,,,,9,,,,,,,
dirt,,,,,mod,,,liquid,,,,,,,,size,,,,,,hp,,,,,check no.,,,,year,,,
street,,,,,,,,,,,,,,air,,,,,,,,,engine

Even though yours doesn't follow exact, it should be close. Some will use codes for the years and other stuff. Look it up on line, you should find it.
my 99 uses x for the year code and my 02 uses 02. Is the YZ a dual sport or dirt?

Hi, do you have any idea at all? 80's, 90's ? I have a 1978 YZ 125, and i can tell that from the engine number, all 1978 yz 125 were stamped 2K6----------
You can find out with a bit of research online, using your engine number. Also, look on the steering stem of the bike for a year date stamp.
Failing all that, make a phone call to your nearest yamaha dealer, and tell them the engine number, they can look it up and tell you what year it iwas built.
One more solution, go to a website like bikepics.com find YZ 125, and look for the model that resembles yours, they have photos of all models, from begining to most current.
So, really the only way to find out is from the engine or frame number.

You don't decode it. It is only a production run series number. Mororcycles are like cars in that respect. It is the frame number, AKA the "VIN number", is what carries all the information. Call a dealer with the frame number and he can tell you year, paint color, specific model and more. They may have a problem if the bike is too old. Yamaha changed to a newer code system a few years back.
Can I get a “very helpful” rating on this answer?

the only way to tell is to match them up with out knowing exactly what year they both are its hard to tell but the change every couple of years